49-17=32
32/8=4
She paid for 4 hours
To nswer this you have to get a scientific calculator and multiply the number in the line of a and b times cos and then divide it for example the line a is 4.24 but when you multiply it by cos it is 0.997263104 and b is 3 but when you multiply by cos its 0.998629534, now divide 0.997263104 by 0.998629534 to get 0.998631694...
Hope this helps
Answer:
14
Step-by-step explanation:
Because you do 2.50 times 30 and that is 75. Next you do 110 - 75 and that is equal to 35. Next you divide 35 by 2.50 and you get 14.
Answer:
see below
Step-by-step explanation:
we have
![5x^2-2x+1=0](https://tex.z-dn.net/?f=5x%5E2-2x%2B1%3D0)
and the quadratic equation is
![ax^2+bx+c=0](https://tex.z-dn.net/?f=ax%5E2%2Bbx%2Bc%3D0)
so we can see that
![a=5\\\\b=-2\\\\c=1](https://tex.z-dn.net/?f=a%3D5%5C%5C%5C%5Cb%3D-2%5C%5C%5C%5Cc%3D1)
and the quadratic formula is
it should go this symbol ± instead of +-
so we insert each value
![x=\frac{-(-2)+-\sqrt{(-2)^2-4(5)(1)} }{2(5)} \\\\x=\frac{2+-\sqrt{4-20} }{10}\\\\x=\frac{2+-\sqrt{-16} }{10} \\\\x=\frac{2+-4i}{10} \\\\x_1=\frac{2(1+2i)}{2*5} \\\\x_1=\frac{1+2i}{5} \\\\x_2=\frac{2(1-2i)}{2*5} \\\\x_2=\frac{1-2i}{5}](https://tex.z-dn.net/?f=x%3D%5Cfrac%7B-%28-2%29%2B-%5Csqrt%7B%28-2%29%5E2-4%285%29%281%29%7D%20%7D%7B2%285%29%7D%20%5C%5C%5C%5Cx%3D%5Cfrac%7B2%2B-%5Csqrt%7B4-20%7D%20%7D%7B10%7D%5C%5C%5C%5Cx%3D%5Cfrac%7B2%2B-%5Csqrt%7B-16%7D%20%7D%7B10%7D%20%5C%5C%5C%5Cx%3D%5Cfrac%7B2%2B-4i%7D%7B10%7D%20%5C%5C%5C%5Cx_1%3D%5Cfrac%7B2%281%2B2i%29%7D%7B2%2A5%7D%20%5C%5C%5C%5Cx_1%3D%5Cfrac%7B1%2B2i%7D%7B5%7D%20%5C%5C%5C%5Cx_2%3D%5Cfrac%7B2%281-2i%29%7D%7B2%2A5%7D%20%5C%5C%5C%5Cx_2%3D%5Cfrac%7B1-2i%7D%7B5%7D)
i don't know if you already know about imaginary numbers if you do then the answer is all the work
if you don't know, well just go until
![x=\frac{2+-\sqrt{-16} }{10}](https://tex.z-dn.net/?f=x%3D%5Cfrac%7B2%2B-%5Csqrt%7B-16%7D%20%7D%7B10%7D)
and say there is no answer to this, because negatives don't have square roots
Answer:
(5,2)
Step-by-step explanation: